﻿//-----------------------------------------------------------------------
// <copyright company="www.3WayWebdesign.de">
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
// </copyright>
//
// <author>Michael Morbach</author>
// <email>Michael@3waywebdesign.de</email>
// <web>http://www.3waywebdesign.de</web>
//-----------------------------------------------------------------------

using System;
using System.Windows.Media;

namespace Tww.Wpf.Controls.Controls.Shared.Helper
{
    public static class ColorHelper
    {
        #region  - Methoden (öffentlich) -

        /// <summary>
        /// Determining Ideal Text Color Based on Specified Background Color
        /// http://www.codeproject.com/KB/GDI-plus/IdealTextColor.aspx
        /// </summary>
        /// <param name="backgroundColor">Color of the background.</param>
        /// <returns></returns>
        public static Color GetIdealTextColorByBackgroundColor(Color backgroundColor)
        {
            const int nThreshold = 105;
            int bgDelta =
                Convert.ToInt32((backgroundColor.R*0.299) + (backgroundColor.G*0.587) + (backgroundColor.B*0.114));
            Color foreColor = (255 - bgDelta < nThreshold) ? Colors.Black : Colors.White;
            return foreColor;
        }

        #endregion
    }
}